參數(shù)資料
型號(hào)： 74HCT21
廠商： NXP Semiconductors N.V.
英文描述： Dual 4-input AND gate(雙4輸入與門)
中文描述： 雙4輸入與門（雙4輸入與門）
文件頁數(shù)： 2/6頁
文件大?。?/td> 33K
代理商： 74HCT21
December 1990
2
Philips Semiconductors
Product specification
Dual 4-input AND gate
74HC/HCT21
FEATURES
Output capability: standard
I
CC
category: SSI
GENERAL DESCRIPTION
The 74HC/HCT21 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT21 provide the 4-input AND function.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W):
P
D
= C
PD
×
V
CC2
×
f
i
+
∑
(C
L
×
V
CC2
×
f
O
) where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs
For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
1.5 V
2.
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
t
PHL
/ t
PLH
C
I
C
PD
propagation delay nA, nB, nC, nD to nY
input capacitance
power dissipation capacitance per package
C
L
= 15 pF; V
CC
= 5 V 10
12
3.5
16
ns
pF
pF
3.5
15
notes 1 and 2
相關(guān)PDF資料
PDF描述
74HC21 Dual 4-input AND gate
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74HC221 Dual non-retriggerable monostable multivibrator with reset
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